Triangular window challenge

Replies to This Discussion

Permalink Reply by Laurent DELRIEU on November 7, 2017 at 2:26pm

Hello,

what you want is not very clear. What have you now ? A mesh where each triangle will be a window ? A surface ? ... 

You can read that 

http://www.grasshopper3d.com/forum/topics/how-to-get-help-when-you-...

I have done something similar but not exactly :

http://www.grasshopper3d.com/profiles/blogs/exoskeleton-and-macro-w...

Permalink Reply by Julie on November 7, 2017 at 2:40pm

Wow. Let me take a few min to read through your project.. in the mean time here is a screenshot of my starting surface which I want to interpolate my mullion design onto. Also, I have attached the rhino files as well... one showing the starting surface and one showing desired result. does that make sense?

Ive tried box morph and simple triangulation scipts such as the one seen attached here, but I'm having trouble getting it to curve around the object.

Attachments:

• grasshopper question.3dm, 7.6 MB

Permalink Reply by Laurent DELRIEU on November 8, 2017 at 9:45am

Your surfaces are portion of revolved surfaces. So search the centers, draw the surfaces and apply a triangulated pattern. 

Here a beginning of solution,Need Lunchbox for triangles. 

Permalink Reply by Laurent DELRIEU on November 8, 2017 at 9:52am

Not happy with  the result

swap UV you will need Intrallattice.

And other advice, try to understand what you want to copy, there are some pattern, curve on plane XY, concentric curves ... you can imagine the flow of the surface. So instead of using very complex surface, reconstruct them. They had many control points, to much for such simple shapes. 

Permalink Reply by Julie on November 9, 2017 at 6:19am

Thank yo so much for the help! I am really trying to get a grasp on this triangulation stuff. I tried installing lunchbox and it wont show up in grasshopper. I tried uninstalling & reinstalling Grasshopper and now grasshopper loads when I installing in rhino but rhino doesn't remember that i loaded the plugin each time i open it and I have to reinstall grasshopper everytime i open rhino now and it still wont show lunch box! haha. I swear this is murphy's law.

Permalink Reply by Laurent DELRIEU on November 9, 2017 at 6:23am

It is also possible to make a little c# which use uv of surface to recreate triangles.

Permalink Reply by Laurent DELRIEU on November 9, 2017 at 6:28am

Also doable with component

Permalink Reply by Julie on November 9, 2017 at 7:40am

I got Lunchbox and intralattice to work and generate the rough geometry I want. Now I'm working on using similar techniques that you used to create the frame for it which is a little different from what you did in your project but very similar. Thank you so much! I couldn't be more appreciative!

Permalink Reply by Laurent DELRIEU on November 9, 2017 at 12:50pm

I did a script to cut holes. It offset extrudes the triangles from Lunchbox and then cut the surfaces and then connect edges with loft. So at the end you will have a solid. I am sure there are many of this type of script on the forum. The only problem is for triangle glass which are often flat there will be no continuity with the shape. It is also possible to bevel the holes using 4 surfaces instead of 2 and using 2 cutting shape instead of 1. 

You will need Clipper because Rhino offset is not good enough for the job !

It has been done in Rhino 6 so there could be some compatibility problem. I test it now. 

Attachments:

• cut_triangles_holes_on_surface_and_thicken.gh, 25 KB

Permalink Reply by Laurent DELRIEU on November 9, 2017 at 12:58pm

With Rhino 5 and a surface internalized

Attachments:

• cut_triangles_holes_on_surface_and_thicken.gh, 23 KB

Permalink Reply by Julie on November 10, 2017 at 6:00am

This is a real frame I'm building so I actually need the triangles to be flat which works out great I offsetted them and I'm trying desperately to get the triangles to all be the same size but not successfully. Do you have any suggestions??? each triangle has a slightly different width.

see picture..

Permalink Reply by Laurent DELRIEU on November 10, 2017 at 11:09am

Quite the same script with some variation, the trick is to use point deform in order to have an offset of triangles (for frame) that will join. There is still a cuter after the clipper offset. 2 offsets of triangles are used to make 2 differents thickness. For the Morpheus I have done more complex geometry, the glass are on a frame and there are joints betweens the glass ...

 

Attachments:

• cut_triangles_holes_on_surface_and_thicken_planar_trinagles.gh, 28 KB